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We are adding 1,400 sqft to our existing 1,600 sqft house. The addition will be on the 2nd floor. How large a system should we be looking at? Would it make sense to have two different zones, one for the upstairs and one for the downstairs?

Anywhere, CA

Originally posted by californiadreamer We are adding 1,400 sq ft to our existing 1,600 sq ft house. The addition will be on the 2nd floor. How large a system should we be looking at? Would it make sense to have two different zones, one for the upstairs and one for the downstairs?

House and Window Orientations ___
... 50 feet x 28 feet or so
.50 or ___ feet faces West with 60 or ___Sq. Feet Windows
.50 or ___ feet faces East with 60 or ___
.28 or ___ feet faces North with 40 or ___
.28 or ___ feet faces South with 40 or ___

What Size System

Thank you to all those who replied. It sounds like I should get two systems. If I need a total of 3 tons, I assume I need two 1.5 systems? Is that correct?
Also, I have heard that leaks in the ducting system is very common how do I check whether my contractor has done a good job installing the ducts?

Re: Anywhere, CA

Dan, Thank you for such a thorough reply. It sounds like I should get two systems. If I need a total of 3 tons, I assume I need two 1.5 systems? Is that correct?
Also, I have heard that leaks in the ducting system is very common how do I check whether my contractor has done a good job installing the ducts?

House and Window Orientations ___
... 50 feet x 28 feet or so
.50 or ___ feet faces West with 60 or ___Sq. Feet Windows
.50 or ___ feet faces East with 60 or ___
.28 or ___ feet faces North with 40 or ___
.28 or ___ feet faces South with 40 or ___